All modern browsers support caching of the client side scripts and data objects. Whether by cookie or web storage/IndexedDB. An application (dynamic) like misago utilises that to use client side code to respond quickly to user interaction. In contrast a static site (for example as generated by hugo) has a 1:1 relationship between link and file and no requirement to interrogate data to build and serve a page.
If client side script is residual development code, and not complete, then you well get that (incorrect) behaviour until the cached storage is replaced with the correct version in the browser.
So not a surprise if you understand what is happening, on both your client and the server, to interrogate the data with client side script, produce the data from the server database, and build the page in your browser to display to you.
Shift+reload can sometimes adequately refresh that stored data on browsers.